Articles about trade in

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T-Mobile Guarantees Best Trade-In Value For Used Devices
Apple Launches iPhone Trade-In Program Across U.S. Stores
Nokia Offering Up To $300 To Trade In Your Old Phone For A Lumia
Samsung Galaxy S4 Launch Results In iPhone Trade-Ins Doubling
Sony goes green with new trade-in and recycling website
iPhone trade-ins at all time high in anticipation of iPhone 5
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Retail stores see increased PS3 trade-ins for Xbox 360 as PSN outage continues